E=ones(8, 1) means that a matrix with 8 rows 1 columns and all elements are 1 is assigned to E, that is to say, E is a column vector of ***8 elements, and each element is equal to 1.

First, introduction.

1, MATLAB is a commercial mathematics software produced by MathWorks Company in the United States. It is an advanced technical computing language and interactive environment, which is used for algorithm development, data visualization, data analysis and numerical calculation. It mainly includes two parts: MATLAB and Simulink.

2. MATLAB is matrix &；; The combination of the word laboratory means matrix laboratory. It is a high-tech computing environment released by mathworks Company in the United States, which is mainly oriented to scientific computing, visualization and interactive programming. It integrates many powerful functions such as numerical analysis, matrix calculation, scientific data visualization, nonlinear dynamic system modeling and simulation in an easy-to-use window environment.

3.MATLAB, Mathematica and Maple are called the three major mathematical softwares. It is second to none in numerical calculation in mathematical science and technology application software. MATLAB can perform matrix operations, draw functions and data, realize algorithms, create user interfaces, and connect programs in other programming languages. Mainly used in engineering calculation, control design, signal processing and communication, image processing, signal detection, financial modeling design and analysis and other fields.

4. The basic data unit of 4.MATLAB is matrix, and its instruction expression is very similar to that commonly used in mathematics and engineering. Therefore, it is much simpler to solve problems with MATLAB than to do the same thing with C, FORTRAN and other languages, and MATLAB also absorbs the advantages of Maple and other software, making MATLAB a powerful mathematical software. Support for C, FORTRAN, C++ and JAVA has also been added in the new version.